Pryproof door striker



y 6, 1969 D. WEYMAN 3,442,543

PRYPROOF DOOR STRIKER Filed Aug. 28, 1967 INVENTOR. 0/77/V/EL wfiymfi/vUnited States Patent 3,442,543 PRYPROOF DOOR STRIKER Daniel Weyman, 96E. Hazelwood Ave., Rahway, NJ. 07065 Filed Aug. 28, 1967, Ser. No.663,850 Int. Cl. Eb 15/02, 17/00 US. Cl. 292-340 1 Claim ABSTRACT OF THEDISCLOSURE 1 This invention relates generally to striker plates or doorocks.

It is generally well known that a thief can often easily gain entranceinto a locked premises by inserting a celluloid strip or other flatobject into a crevice between the molding around the doorway and thedoorway frame, the celluloid strip being pushed inwardly against theinclined front end wall of the sliding bolt, so to cause the bolt to bewithdrawn out of the doorway and striker plate openings, thus unlockingthe door without requiring a key. In view of the great prevalence ofsliding bolts of this design, which are of course necessary in order tomake doors easily self-locking, there is a need for a burglar proofconstruction to be incorporated therewith.

Accordingly it is a principal object of the present invention to providea striker plate for a door lock, the plate having self-contained meanswhereby a flat object inserted into a crevice between a doorway moldingand doorway frame will be guided into a direction away from the boltinclined front end wall, thus preventing the sliding of the bolt into anunlocked position.

Another object is to provide a pryproof door striker plate having asidewardly extending lip to form a shield for the bolt, the shield beingstruck out from the material removed from the striker plate to form theslide bolt opening therein, the shield accordingly not generallyincreasing at all the production cost of the striker plate.

Yet another object is to provide a striker plate having a sidewardlyextending shield which will not in any way interfere with the normaloperation of the door lock.

Other objects are to provide a pryproof door striker plate which issimple in design, inexpensive to manufacture, rugged in construction,easy to use and efiicient in operation.

These and other objects will be readily evident upon a study of thefollowing specification and the accompanying drawing wherein:

FIGURE 1 is a perspective view of the invention,

FIGURE 2 is a cross sectional view taken on line 2-2 of FIGURE 1 andshown in operative use with a door lock,

FIGURE 3 is a similar view of a modified form of the invention, showingthe device in an unlocked position, and

FIGURE 4 is a view similar to FIGURE 3 showing the device in lockedposition.

Referring now to the drawing in detail, the reference numeral representsa striker plate according to the present invention wherein there is arectangular, fiat plate 11 having a tab 12 along one edge 13 againstwhich the end 14 of a lock sliding bolt 15 may slide while travelingbetween a locked and unlocked position. Openings 16 are provided forreceiving mounting screws for securing the striker plate to a doorwayframe 17. An opening 18 is formed in the striker plate for receiving thesliding bolt 15 when it projects into opening 19 of the doorway frame17. The opening 18 has a sidewardly bent shield 20 along one edgethereof which is opposite to the edge thereof that is closest to tab 12.

In operative use, as shown in FIGURE 2, if a person 21, on the outerside 22 of the door 23 inserts a flat object 24 into a crevice 25 formedbetween doorway molding 26 and doorway frame 27 in an attempt to unlockthe door by pushing the object 24 across the inclined front wall 28 ofthe sliding bolt 15, the shield will prevent movement of the object intothe intended direction, but will divert its travel as is shown into anon-useful direction, and halt its further insertion.

It will be noted that the door 23 has a small notch 29 to clear theshield when normally opening and closing the door.

In the modified construction, shown in FIGURES 3 and 4, the strikerplate 30 includes a fulcrum 31 on which an arm 31a is centrally pivotedby a pin 32. A slot 33 in one end'of the arm receives a pin 34 securedtransversely in a pin 35 supported in opening 36 of a block 37 on thestriker plate. A compression coil spring 38 around pin 35 normally urgespin 35' away from a leaf spring 39 springingly placed over the end ofthe opening 36, the leaf spring being secured by rivets 40 to thestriker plate. The opposite end of arm 31a has a slot 41 to receive pin42 secured transversely in a pin 43 fitted into an opening 44 in thestriker plate. The door 45 carries a lock having sliding bolt 46engageable in striker plate opening 47. A notch 48 on the door serves asa relief to clear the leaf spring 39 when the door is in a lockedposition. In this form of the invention there is no projecting shieldupon which a person may hook himself when the door is open, however whenit is closed, the leaf spring projects outwardly into the notch 48 so toserve in a like manner as shield 20, above, for diverting an object 24.In this form of the invent-ion, the edge 49 of the door forces pin 43 topivot the arm, 31a, so to cause pin 35 to push the leaf springsidewardly, as shown in FIGURE 4.

While various changes may be made in the detail construction, it isunderstood that such changes will be within the spirit and scope of thepresent invention.

Having thus set forth and disclosed the nature of this invention, whatis claimed is:

1. In a striker plate for a door lock, the combination of a fiat platehaving a plurality of spaced apart holes to receive mounting screws, andan opening for receiving a sliding bolt of said lock, said openinghaving a sidewardly extending lip on one edge thereof to form a shieldfor said sliding bolt, wherein said sidewardly extending shieldcomprises a leaf spring secured at one end by rivets to said strikerplate, said leaf spring being normally urged sidewardly by the end of apin extending through a block on said striker plate, the opposite end ofsaid pin being pivotably secured to one end of an arm centrally pivotedon a fulcrum secured to said striker plate, the opposite end of said armbeing pivotably secured to a second pin extending through an opening insaid striker plate, said second pin being normally pushed by the edge ofa closed door to pivot said arm and cause the first said pin to flexsaid leaf spring sidewardly and shield said bolt.

References Cited UNITED STATES PATENTS E. J. MCCARTHY, AssistantExaminer.

US. Cl. X.R. 292-346

